CN104989591A - Blade with adjustable flapping wings - Google Patents
Blade with adjustable flapping wings Download PDFInfo
- Publication number
- CN104989591A CN104989591A CN201510386565.2A CN201510386565A CN104989591A CN 104989591 A CN104989591 A CN 104989591A CN 201510386565 A CN201510386565 A CN 201510386565A CN 104989591 A CN104989591 A CN 104989591A
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- Prior art keywords
- blade
- flapping wing
- gears
- rack
- adjustable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
A blade with adjustable flapping wings comprises a blade tip, a blade root and a blade body which is located between the blade tip and the blade root. The blade is installed on a wind wheel of a wind turbine through the blade root. The blade is characterized by further comprising a flapping wing assembly and a driving unit, wherein the flapping wing assembly is installed on the blade body in a telescopic mode and comprises at least one flapping wing; the driving unit is located in the blade body, connected with the flapping wing assembly and used for driving the flapping wing assembly to stretch out and draw back.
Description
Technical field
The present invention relates to a kind of pneumatic equipment blades made, particularly the flapping wing adjustable blade of the automatic adjustable shape of a kind of energy.
Background technique
Wind energy conversion system is the dynamic power machine of mechanical energy by wind energy transformation, and blade determines the height of wind energy conversion system wind energy utilization efficiency, is the core component of whole wind energy conversion system.The aeroperformance of blade directly affects the runnability of wind energy conversion system, also affects the wind energy utilization efficiency of wind energy conversion system.Fig. 1 is that conventional wind machine vane airfoil profile streams schematic diagram, conventional wind machine blade is at the angle of attack (in fluid mechanics, the angle of attack, also claims the angle of attack, the wing or blade for point aircraft, the angle of attack is defined as the angle between wing chord and speed of incoming flow, come back as just, it is negative for bowing) when increasing to a certain degree, blade surface can produce flow separation, cause ratio of lift coefficient to drag coefficient sharply to decline, reduce the wind energy conversion efficiency of wind energy conversion system simultaneously.Therefore the blade of designing and making suitable stereo shape is the key of the wind energy conversion efficiency of wind energy conversion system.But, pneumatic equipment blades made is when designing and producing and install, often can only consider the situations of attack in certain limit, namely it cannot adapt to changeable air mobility status, from this angle, the blade that a kind of energy initiatively carries out the adjustment of blade stero shape according to air flow condition or wind energy conversion system working environment solves the adaptive key of blade.
For this problem, object and the mode of adjustment are more, regulating face area: as Chinese invention patent " the wind-catching surface adjustable vane of wind power generator impeller and blade adjustments method thereof " (publication number CN101718251, publication date 2012.06.02) disclose a kind of pneumatic equipment blades made of adjustable blowing area, it is by designing special movable quadrilateral blade rack, by the driving mechanism of blade interior, the quadrilateral blade rack of blade is occurred flexible, thus change blade shape and blowing area, and then keep the wind energy conversion efficiency of design; The work angle of attack of adjusting vane: Chinese invention patent " a kind of blade incidence-angle-adjutypele typele vertical-shaft wind turbine " (publication number CN103573553, publication date 2014.02.12) disclose a kind of vertical axis windmill of the adjustable vane angle of attack, its blade can along with air flowing situation and self-control, without the need to arranging the structure of the motor of power, simple and practical.But for the blade of now large-scale wind energy conversion system, in order to produce larger power, its structure is very huge: little of several meters, large to tens meters, even the wind energy conversion system of up to a hundred meters has occurred, obvious such scheme has just been not suitable for: after the application of movable quadrilateral blade rack and large-scale blade, its driving mechanism can because of driven object huge and very complicated, and high cost must be brought; The vertical axis windmill of the adjusting vane angle of attack is suitable only for small-power occasion.In addition, when existing fixed pneumatic equipment blades made runs under large attack angle, blade surface there will be the situation of flow separation, the wind energy utilization of pneumatic equipment blades made is caused to reduce, therefore simple and practical structure is adopted to adjust the stero shape of pneumatic equipment blades made in real time, thus adaptation pneumatic equipment blades made automatically can make adjustment in angle of attack variation situation, thus the wind energy utilization improving pneumatic equipment blades made is that researcher needs a problem of solution in the art.
Summary of the invention
For solving the problem, the present invention adopts and transforms in the structure of existing pneumatic equipment blades made, and install scalable flapping wing assembly additional, concrete the present invention adopts following technological scheme:
A kind of flapping wing adjustable blade, the blade body comprising blade tip, root of blade and be positioned at therebetween, blade is arranged on wind mill wind wheel by root of blade, it is characterized in that, also comprise: flapping wing assembly, be telescopicly arranged on blade body, comprise at least one flapping wing; Driver element, is positioned at blade body inside, is connected with flapping wing assembly, for driving the flexible of flapping wing assembly.
Flapping wing adjustable blade provided by the invention, can also have such feature: blade body has cavity, and driver element is positioned at blade body cavity.
Flapping wing adjustable blade provided by the invention, can also have such feature and also comprise: detection and control unit, comprising: monitor, be positioned at blade body cavity, angle of attack size residing during for detecting blade working; Controller, is positioned at blade body cavity, is connected with detector, for the start and stop of angle of attack numerical control drive unit recorded according to monitor.
Flapping wing adjustable blade provided by the invention, such feature can also be had: wherein, driver element comprises motor, rotating shaft and at least one group of rack and pinion assembly, motor is positioned at root of blade, is connected with rotating shaft, and rotating shaft is connected with one end of rack and pinion assembly, the other end of rack and pinion assembly is connected with the tail end of flapping wing, driven by motor axis of rotation, and then driven gear tooth bar component movement, stretching for flapping wing.
Flapping wing adjustable blade provided by the invention, such feature can also be had: rack and pinion assembly, comprise two gears and between two gears and and the tooth bar that is meshed of gear, one end of tooth bar and two gears are meshed, the other end is connected with the tail end of flapping wing, and two gears are connected with rotating shaft respectively, rotate under the drive of rotating shaft, when two gears all rotate counterclockwise, tooth bar drives the elongation of flapping wing under the drive of two gears; When two gears all rotate clockwise, tooth bar drives the shortening of flapping wing under the drive of two gears.
Flapping wing adjustable blade provided by the invention, can also have such feature: wherein, and rack and pinion assembly is 3 groups, lays respectively at two ends and the neutral position of flapping wing tail end.
Flapping wing adjustable blade provided by the invention, can also have such feature: wherein, and the mode that tooth bar is connected with flapping wing tail end is that bolt is connected.
Flapping wing adjustable blade provided by the invention, can also have such feature: wherein, and gear is spur gear
Invention effect and effect
According to flapping wing adjustable blade provided by the invention, owing to being provided with flapping wing assembly on general blade, it is telescopic is arranged on blade body, the extension and contraction control of flapping wing can be realized, affect blade gas flow situation operationally, thus the situation that the blade surface reducing wind turbine impeller produces flow separation occurs, and improves the wind energy conversion efficiency of wind energy conversion system.
Accompanying drawing explanation
Fig. 1 is that conventional wind machine vane airfoil profile streams schematic diagram;
Fig. 2 is wind machine structure schematic diagram;
Fig. 3 is the structural representation of flapping wing adjustable blade cross section of the present invention;
Fig. 4 is without flapping wing blade emulation streamline chart;
Fig. 5 band flapping wing blade emulation streamline chart.
Embodiment
Below in conjunction with accompanying drawing and example, the specific embodiment of the present invention is further described, but should limit the scope of the invention with this.
Fig. 2 is wind machine structure schematic diagram
Fig. 3 is the structural representation of the flapping wing adjustable blade cross section of the present embodiment
As Fig. 2, shown in Fig. 3, the blade body 30 that flapping wing adjustable blade 100 comprises blade tip 10, root of blade 20 and is positioned at therebetween, root of blade 20 wherein connects with the wheel hub of wind mill wind wheel, blade body inside has cavity 31, and blade body comprises leading edge 32 and trailing edge 33, wherein, at trailing edge 33, place is provided with slit 331, for installing flapping wing.
Driver element 40, be positioned at the cavity 31 of blade body inside, wherein, three groups of rack and pinion assemblies 42 that driver element comprises the motor (not shown in FIG.) being installed on root of blade 20, two rotating shafts 41 and is evenly arranged in rotating shaft 41, rack and pinion assembly 42, comprise two spur gears 421 and a toothed rack 422, tooth bar 422 two sides is provided with tooth, and the tooth bar 422 that two spur gears 421 are located between them engages; When motor 40 drives two rotating shafts 41 and two spur gears 421 be connected in rotating shaft to rotate, together with rack and pinion assembly 42 middle rack is bolted with flapping wing tail end and is fixedly connected, for driving the flexible of flapping wing.
Flapping wing assembly 50, comprises a flapping wing 51, and wherein, flapping wing 51 tail end is connected with tooth bar 422, and controlled flexible by driver element, head end protrudes from outside blade body 30 by slit 331;
Detection and control unit (not shown in FIG.), comprises monitor, is positioned at blade body cavity 31, angle of attack size residing during for detecting blade working; Controller, is also positioned at blade body cavity, is connected with detector, for the motor in the angle of attack SC sigmal control driver element 40 that records according to monitor.
In using upon the rotation of the blade, detector is for detecting the angle of attack size of blade.When detector detects that blade is in the situation of Low Angle Of Attack, information is delivered to controller, controller will send instruction to the motor of driver element 40, makes it rotate clockwise thus drives flapping wing 51 to be returned to home position.Band carry-over bar 422 moves to blade interior direction by the rotating counterclockwise of motor of driver element 40, and the flapping wing 51 be connected with tooth bar 422 shrinks to blade interior, makes flapping wing 51 rear end be contracted to trailing edge 33 place.Now, the chord length of blade is identical with the blade chord length (chord length refers to the distance from blade inlet edge 32 to trailing edge 33) not increasing flapping wing, and flow separation phenomenon does not appear in blade surface.
Blade continues to rotate, and when detector detects that blade is initially located in the situation of large attack angle, for avoiding blade surface to occur flow separation phenomenon, information is delivered to controller, and controller will send instruction to the motor of driver element 40, makes it rotate counterclockwise.Now, band carry-over bar 422 moves to trailing edge 33 direction by the motor be rotated counterclockwise, and flapping wing 51 head end be connected with tooth bar 422 outwards extends.Now, be equivalent to add blade chord length from the outward extending flapping wing 51 of trailing edge 33, make blade surface avoid occurring flow separation phenomenon in large attack angle situation.Detector is delivered to controller the angle of attack variation detected, controller sends instruction according to the size of attack angle of blade to motor, and driven gear 421 rotates, and drives tooth bar 422 to move, thus the extending amount of suitable adjustment flapping wing 51, ensure that blade surface does not occur flow separation phenomenon always.
Fig. 4 is without flapping wing blade emulation streamline chart
Fig. 5 band flapping wing blade emulation streamline chart
Below in order to illustrate that the blade of the adjustable flapping wing of band provided by the present invention is to the effect slackening blades flows segregation phenomenon, computer calculate is used to simulate under different angle of attack size, the blade with adjustable flapping wing and the common air flow stream line without adjustable flapping wing blade.
As Fig. 4, shown in 5, under being illustrated respectively in 16 degree and 18 degree of situations of attack, the streamline chart flowed in flapping wing adjustable blade (Fig. 5) and the common air without adjustable flapping wing blade (Fig. 4), can observe clearly, the blade blade surface of band provided by the invention is adjustable flapping wing does not almost have flow separation phenomenon, and the common blade surface flow separation phenomenon without adjustable flapping wing blade is fairly obvious.
The effect of embodiment and effect
According to the flapping wing adjustable blade that the present embodiment provides, owing to being provided with flapping wing assembly on general blade, it is telescopic is arranged on blade body, the extension and contraction control of flapping wing can be realized, affect blade gas flow situation operationally, thus the situation that the blade surface reducing wind turbine impeller produces flow separation occurs, and improves the wind energy conversion efficiency of wind energy conversion system.The flapping wing used and structure of driving unit simply, are suitable for large-scale blade and install and use.
The detection and control unit simultaneously used, has and automatically detects angle of attack size and control the flexible function of driver element adjustment flapping wing, make to regulate adaptation voluntarily according to working condition when using, use simultaneously.
These are only better embodiment of the present invention, be not used for limiting practical range of the present invention.Have in any art and usually know the knowledgeable, not departing from thinking of the present invention and scope, when doing various changes with flexible, therefore protection scope of the present invention should be as the criterion with claims institute confining spectrum.
Claims (8)
1. a flapping wing adjustable blade, the blade body comprising blade tip, root of blade and be positioned at therebetween, described blade is arranged on wind mill wind wheel by described root of blade, it is characterized in that, also comprises:
Flapping wing assembly, is telescopicly arranged on described blade body, comprises at least one flapping wing;
Driver element, is positioned at described blade body inner, is connected with described flapping wing assembly, for driving the flexible of described flapping wing assembly.
2. flapping wing adjustable blade as claimed in claim 1, is characterized in that:
Described blade body has cavity, and described driver element is positioned at described blade body cavity.
3. flapping wing adjustable blade as claimed in claim 1, characterized by further comprising:
Detection and control unit, comprising:
Monitor, is positioned at described blade body cavity, angle of attack size residing during for detecting blade working;
Controller, is positioned at described blade body cavity, is connected with described detector, for the start and stop of drive unit described in the angle of attack numerical control that records according to described monitor.
4. flapping wing adjustable blade as claimed in claim 1, is characterized in that:
Wherein, described driver element comprises motor, rotating shaft and at least one group of rack and pinion assembly,
Described motor is positioned at described root of blade, is connected with described rotating shaft, and described rotating shaft is connected with one end of described rack and pinion assembly, and the other end of described rack and pinion assembly is connected with the tail end of described flapping wing,
Axis of rotation described in described driven by motor, and then drive described rack and pinion assembly to move, stretching for described flapping wing.
5. flapping wing adjustable blade as claimed in claim 4, is characterized in that:
Described rack and pinion assembly, comprise two gears and between described two gears and
With the tooth bar that described gear is meshed, one end and described two gears of described tooth bar are meshed, and the other end is connected with the tail end of described flapping wing, and described two gears are connected with described rotating shaft respectively, rotate under the drive of described rotating shaft,
When two described gears all rotate counterclockwise, described tooth bar drives the elongation of described flapping wing under the drive of two gears;
When two described gears all rotate clockwise, described tooth bar drives the shortening of described flapping wing under the drive of two gears.
6. flapping wing adjustable blade as claimed in claim 4, is characterized in that:
Described rack and pinion assembly is 3 groups, lays respectively at two ends and the neutral position of described flapping wing tail end.
7. flapping wing adjustable blade as claimed in claim 4, is characterized in that:
Wherein, the mode that described tooth bar is connected with described flapping wing tail end is that bolt is connected.
8. flapping wing adjustable blade as claimed in claim 4, is characterized in that:
Wherein, described gear is spur gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510386565.2A CN104989591A (en) | 2015-06-30 | 2015-06-30 | Blade with adjustable flapping wings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510386565.2A CN104989591A (en) | 2015-06-30 | 2015-06-30 | Blade with adjustable flapping wings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104989591A true CN104989591A (en) | 2015-10-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510386565.2A Pending CN104989591A (en) | 2015-06-30 | 2015-06-30 | Blade with adjustable flapping wings |
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| Country | Link |
|---|---|
| CN (1) | CN104989591A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108298062A (en) * | 2018-01-15 | 2018-07-20 | 上海理工大学 | It can be from the adaptive wing flap of moving constraint |
| CN108590978A (en) * | 2018-04-09 | 2018-09-28 | 方高健 | It is a kind of contractile wind power generation stepped |
| WO2020260485A1 (en) * | 2019-06-27 | 2020-12-30 | Wobben Properties Gmbh | Rotor for a wind turbine, wind turbine and associated method |
| CN112874781A (en) * | 2021-02-08 | 2021-06-01 | 哈尔滨工业大学 | Wing flapping mechanism of bat flapping wing imitating aircraft |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3129769A (en) * | 1962-09-21 | 1964-04-21 | Kaman Aircraft Corp | Fail safe device for servo flap controlled rotor blades |
| JP2005248935A (en) * | 2004-03-03 | 2005-09-15 | Haruo Fujiwara | Windmill for wind power generation |
| JP2007146851A (en) * | 2007-01-10 | 2007-06-14 | Seabell International Co Ltd | Windmill for wind power generation and wind power generator |
| US20090028705A1 (en) * | 2007-06-22 | 2009-01-29 | Gamesa Innovation & Technology, S.L. | Wind turbine blade with deflectable flaps |
| US20120141269A1 (en) * | 2011-09-09 | 2012-06-07 | General Electric Company | Extension for rotor blade in wind turbine |
| CN102734083A (en) * | 2012-05-16 | 2012-10-17 | 东南大学 | Wind driven generator paddle used for resisting strong wind |
| KR20130024612A (en) * | 2011-08-31 | 2013-03-08 | 대우조선해양 주식회사 | Variable blade for wind power generator |
-
2015
- 2015-06-30 CN CN201510386565.2A patent/CN104989591A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3129769A (en) * | 1962-09-21 | 1964-04-21 | Kaman Aircraft Corp | Fail safe device for servo flap controlled rotor blades |
| JP2005248935A (en) * | 2004-03-03 | 2005-09-15 | Haruo Fujiwara | Windmill for wind power generation |
| JP2007146851A (en) * | 2007-01-10 | 2007-06-14 | Seabell International Co Ltd | Windmill for wind power generation and wind power generator |
| US20090028705A1 (en) * | 2007-06-22 | 2009-01-29 | Gamesa Innovation & Technology, S.L. | Wind turbine blade with deflectable flaps |
| KR20130024612A (en) * | 2011-08-31 | 2013-03-08 | 대우조선해양 주식회사 | Variable blade for wind power generator |
| US20120141269A1 (en) * | 2011-09-09 | 2012-06-07 | General Electric Company | Extension for rotor blade in wind turbine |
| CN102734083A (en) * | 2012-05-16 | 2012-10-17 | 东南大学 | Wind driven generator paddle used for resisting strong wind |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108298062A (en) * | 2018-01-15 | 2018-07-20 | 上海理工大学 | It can be from the adaptive wing flap of moving constraint |
| CN108298062B (en) * | 2018-01-15 | 2021-03-12 | 上海理工大学 | Self-restrained adaptive flap |
| CN108590978A (en) * | 2018-04-09 | 2018-09-28 | 方高健 | It is a kind of contractile wind power generation stepped |
| CN108590978B (en) * | 2018-04-09 | 2019-07-09 | 青岛昂吉利钢构有限公司 | It is a kind of contractile wind power generation stepped |
| WO2020260485A1 (en) * | 2019-06-27 | 2020-12-30 | Wobben Properties Gmbh | Rotor for a wind turbine, wind turbine and associated method |
| CN112874781A (en) * | 2021-02-08 | 2021-06-01 | 哈尔滨工业大学 | Wing flapping mechanism of bat flapping wing imitating aircraft |
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Application publication date: 20151021 |